It's not that simple. Sure, unpopular systems are more obscure and less likely to attract attention, but you're wrong in extending that to "if it's popular, it will be broken" (denying the antecedent).
As a counter-example, I propose DirecTV or even their competitor, Dish Network (Nagravision). Hacks of these systems are worth 6 figures, pay TV is widely desired, and there hasn't been a DTV hack since 2004. None.
As a counter-example, I propose DirecTV or even their competitor, Dish Network (Nagravision). Hacks of these systems are worth 6 figures, pay TV is widely desired, and there hasn't been a DTV hack since 2004. None.